Metallics DWC6B 6 x 21/4 in. Bugle Head Phillips Drywall Screws - Steel Black Phosphate - Coarse Threads - Each

Coarse thread, sharp point screws such as the DWC6B are for wood framing. The thread spacing is coarse at 8 to 10 threads per inch with a sharp point, which bites into wood rather than piercing steel. Metallics lists the application as wood to wood, drywall to wood and cabinet installations. For light gauge steel studs you want a fine thread (high-low) drywall screw with a needle point instead.

No. Black phosphate is an interior finish with minimal corrosion resistance, and these are listed as steel black phosphate with a black phosphate/galvanized finish classification for dry interior work. For exterior decks, soffits, or wet locations, use a screw with a coated or hot dip galvanized exterior rating.

No. The DWC6B is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic sourcing clause, this screw will not satisfy it.

A #2 Phillips bit. The head takes a Phillips drive with a recess diameter of 0.176 to 0.201 inch and 0.106 inch recess depth, which is standard #2 territory. Three power bits ship with the screws, so you are not hunting for one on the first day of the job.

That is what the bugle head is for. The DWC6B head is a bugle profile measuring 0.315 to 0.347 inch across with a head height of 0.020 to 0.031 inch, so the curved underside compresses the paper and seats just below the surface for taping instead of cutting through it. Set your driver clutch so the head dimples rather than spins through.

The DWC6B ships as a box with a 3000 each order minimum, so it is a bulk buy sized for production drywall or multi-unit work rather than a punch list. Metallics notes other sizes and quantities are available by request in the JDWC and DWC series.

Hardness runs Rockwell C45-64 on AISI 1018 steel, which is a case hardened drywall screw. That keeps the Phillips recess from stripping under a collated or clutch driver. Bear in mind a hardened #6 screw is brittle in shear, so it is a fastener for holding board and cabinets, not a structural or load bearing connection.

Because there is no single industry standard for drywall screw or bugle head dimensions. Metallics publishes the figures as a guide, which is why head width shows 0.315 to 0.347 inch and threads per inch show 8 to 10, and slight deviations between production lots are acceptable. If you are matching an existing fastener exactly for a spec submittal, work from the actual sample.